So a user tips a dev for a project, and leaves a comment and/or feature request. Weeks later, the dev can see who has left the most tips, and/or when a person tips they can select from a bunch of feature requests or make a comment.
So expanding on a comment I left in another part of this thread, the site would be called "follow up tip" and users connect their soundcloud, youtube, github and other accounts. They leave a tip url on tracks, videos or projects: http://followuptip.com/tipme/myusername
On that page, the site determines who the giver is (they're signed in,) what the tip is about (the site connects the referring url to an underlying project or media.. or the user will manually select it from those imported upon signup (and updated/synced regularly)) and an address is generated on-the-fly, which is tracked for some payment (and can be auto-forwarded.)
On the other hand, a person may not tip at all to that address (it's optional), but leave some message instead for a feature request or idea and then some bounty amount. The artist or developer then uses these requests to determine what to create/develop next, and they follow it up to all relevant tippers or requesters upon release/creation. "I've just released that feature" to which a tip can then be made against. Or, an artist (or video producer) can offer special release tracks first or the highest-quality downloads to their largest tippers who they message on a new track release. Or t-shirts or some exclusive merchandise can be provided for those who give over a certain amount.
The problem with blockchain addresses is there is no identity or username attached, and that's one thing the reddit tipbot overcomes and has thus made it popular (it's also publically visible too); and there's no efficient way to do followup (which this idea aims to solve.) A tipper may be happy to tip again, as well as buy some product (ie become a customer,) or send some link to friends when released. (if these friends also make tips, then the send user can earn referral points)
Perhaps there could be a way to create a specific tip page with a certain yt, soundcloud, or github song/vid/project embedded that can be tweeted out or sent to people, and if a person wants to leave a tip, a blockchain address is generated on-the-fly for them. There could be browser plugin that generates a short-url for any page on aforementioned sites: a page with the song/vid/project already embedded for tipping.
Any tip received can have a commission taken by followuptip before depositing into site account or else forwarding.